When a neuron is at rest, _____
a. it is at threshold potential
b. gated sodium channels are open
c. it holds less sodium than the interstitial fluid
d. both it is at threshold potential and it holds less sodium than the interstitial fluid
C
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Which of the following cell types can become the meristematic cells of a vascular cambium? Select all correct choices
A. shoot apical meristem cells B. procambial cells C. epidermal cells D. parenchymal cells
Which of the following is/are TRUE
What will be an ideal response?
What causes the reproductive isolation that can lead to speciation?
A) Members of one group don't want to mate with other groups. B) Members of one group are unable to make fertile offspring with other groups. C) A group is extinct. D) Some members of a group are sterile.
A prokaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
A) A spheroplast B) Archaea C) Gram-negative D) Gram-positive E) Acid fast